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Ballistics Showcase

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Ballistics Showcase

Unread postAuthor: Hotwired » Wed Mar 05, 2008 2:58 pm

Aside from cannons, people also like to see cannon effects, be that distance shots, special effects or the ever popular damage shots.

I think a dedicated shot showcase would be useful and desireable for visitors and members. Specifically about shots taken and not for cannon posting but links to the cannon used would be useful.

There might have to be some enforced rules on how to post a shot to allow comprehensible searching so a thread might be called for example:

20mm Ball Bearing Vs 1.5" Chipboard

With optional speed and energy levels after that if known e.g

20mm Ball Bearing Vs 1.5" Chipboard @ 219m/s 453J


There is currently a forum section for "Construction Materials/Ammo Discussion" but as it says it's for discussion of ammo plus a whole raft of other things.


What say ye?
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Unread postAuthor: SpudFarm » Wed Mar 05, 2008 3:38 pm

i made a topic like this a while ago but it died out...
but i got some of my hybrid but you have probably seen it before because i post every shot on this forum :)

i don't really understand this tread but i assume it is for damage :- S

sorry if i crap my pants by posting pics hear : - S

Edit: like i understand it after thinking a bit you mean like a place where everyone can make new threads and show their damage but i give it a go ;)
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Attachments
IMG_0422.JPG
this was my first shots...
SP_A0377.jpg
a bunch of lead balls at a two by four
SP_A0388.jpg
i tried a 1/4" stainless steel plate (i will try again)
SP_A0384.jpg
i shot a marble through a two by four
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Unread postAuthor: DYI » Wed Mar 05, 2008 4:44 pm

150 gram hole punch, saboted in 20g of duct tape, vs. 1/4" normalized steel plate. MV: ~705 fps (217m/s), KE: 2 915 ft/lbs (~4 KJ).

Entry:

Image

Exit:

Image

Through'n'through. :D
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Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 05, 2008 5:06 pm

I can just imagine a mother whose poor kid had spent ages convincing her that "it's only a spudgun mom, what harm could it do?", at which point she comes across this thread :roll: :D
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Unread postAuthor: daberno123 » Wed Mar 05, 2008 5:09 pm

Actually i told my mom someone had been able to penetrate 1/4" steel plate with a spudgun and she just gave me a funny look...

Don't think she believed me
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Unread postAuthor: potatoflinger » Wed Mar 05, 2008 5:18 pm

I think it's a good idea, I also think there should be a showcase section for targets, a safe target is very important.
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Unread postAuthor: jrrdw » Wed Mar 05, 2008 6:04 pm

Maby the showcase sections should have sub-sections. One for combustion ammo stats and target and pics, same for pneumatics showcase ect....

Would be easily searched as well. "Specifically about shots taken and not for cannon posting but links to the cannon used would be useful."
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Unread postAuthor: Ragnarok » Wed Mar 05, 2008 6:06 pm

jackssmirkingrevenge wrote:I can just imagine a mother whose poor kid had spent ages convincing her that "it's only a spudgun mom, what harm could it do?", at which point she comes across this thread.

Ooh, that would be harsh - and I'm not sure that "mother" would have any idea about the vast power gap between a simple combustion spuddy, and DYI's colossus.

Mind you, if my parents were completely wised-up to the capacities of some of my launchers, they might not be as receptive to them.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: bluerussetboy » Wed Mar 05, 2008 10:26 pm

DA: Your Honor, I would like to present evidence that proves Redneck Jim murdered Hillbilly Bob. Exhibit A, The Baby Carrot Ballistics Chart.
Defense Attorney: I object!!!
The Judge: On what grounds?
Defense Attorney: The fact that this ballistics chart is for combustions and not pneumatics!
The Judge: Sustained.
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 05, 2008 10:41 pm

Excellent, give the man some Spud Bux :)
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Unread postAuthor: jrrdw » Thu Mar 06, 2008 6:01 am

bluerussetboy wrote:DA: Your Honor, I would like to present evidence that proves Redneck Jim murdered Hillbilly Bob. Exhibit A, The Baby Carrot Ballistics Chart.
Defense Attorney: I object!!!
The Judge: On what grounds?
Defense Attorney: The fact that this ballistics chart is for combustions and not pneumatics!

The Judge: Sustained.


Sooooo, I'm guessing this is sarcasum directed at my thoughts of sub-dividing said section?
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Unread postAuthor: bluerussetboy » Thu Mar 06, 2008 7:45 am

nah.

everybody knows rednecks are smarter then hillbillies, so they use pneumatics. :D
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Unread postAuthor: Hotwired » Thu Mar 06, 2008 7:55 am

When you say a projectile is for example:

100g 1/2" steel rod @ 190m/s (1805J)

How important is it to have two similar shots divided because one was from a pneumatic and one from a hybrid?

You could say inside that it was a combustion but when listing them the cannon doesn't need to be there.


Incidentally, for anyone who doesn't want to do 1/2MVsqrd to work out energy theres a handy calculator here if say you've weighed and clocked the speed of a projectile and want to know it's energy.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 06, 2008 8:00 am

Hotwired wrote:Incidentally, for anyone who doesn't want to do 1/2MVsqrd to work out energy theres a handy calculator here if say you've weighed and clocked the speed of a projectile and want to know it's energy.


I find this one to be much more useful, while this one will plot you a graph on how energy varies with velocity for a given projectile weight.
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Unread postAuthor: Solar » Fri Mar 07, 2008 4:27 am

bluerussetboy wrote:nah.

everybody knows rednecks are smarter then hillbillies, so they use pneumatics. :D


haha, those hillbillies just need to test their moonshine vapors somewhere!
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